File:Trådtelefon-illustration.png: Revision history

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    12 January 2016

    • curprev 00:4600:46, 12 January 2016‎ Tbastaji talk contribs‎ 364 bytes +364‎ A tin can telephone is a type of acoustic (non-electrical) speech-transmitting device made up of two tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire. It is a form of mechanical telephony, where sound is co...
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